Marilyn MonroeAlleged Kennedy Bros. Sex Tape Auction Canceled

3/3/2014 4:10 PM PST

Marilyn Monroe -- Alleged John F. Kennedy Sex Tape Auction Canceled

EXCLUSIVE

The home movie of Marilyn Monroe banging John F. Kennedy and his brother Robert F. Kennedy ... will NOT be going up on the auction block ... TMZ has learned.

The Tulare County Sheriff's Department tells us the auction, which was scheduled to go down tomorrow ... has been canceled because William Castleberry -- the owner of the 8mm film -- settled his $200,000 debt.

Castleberry's attorneys tell us they have no idea who made the payment -- all they know is Casteleberry's stuff will be returned ... and the world will have to wait to see Marilyn's alleged threesome with the Kennedy bros.